Ever wondered about the emissions of your lanwmower? Not many people do - but for our regular commentator on sustainability, it was something that piqued his interest: listen as Denis Olmstead analyses the figures on oil, petrol and emissions for that device which cuts the grass - nevermind burping cows, are lawnmowers the next target in reducing emissions? Denis also looks at sustainability in business - the bad examples, needing a reworking of business practices in order to save money and resources; and the good examples, with the largest soft-drink company in the world moving to reduce the thickness of the metal used in drinking cans, and the comparitive costs of different sized drink containers on the environment.